JP3062128B2 - Connection terminal for lightning conductor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connection terminal for mechanically and electrically connecting a lightning conductor such as a stranded wire, a round bar or a tube. The connection terminal of the present invention can be used for connection of a wire rod or the like of a general building structure or a work, but is a practically effective connection terminal especially for connection of a lightning arrester of a lightning arrester.

[0002]

2. Description of the Related Art Conventional connection terminals used for lightning arrester construction and grounding construction are copper brazing, brass brazing, silver brazing, and the like.
There are those that are melt-bonded using a heater such as soldering, and those that connect tubular connection terminals using screws without brazing.

[0003]

The place where the lightning arrester is installed is wide ranging from the highest position of the skyscraper to the underground such as grounding work. The use of flames for brazing is also very difficult in high-rise buildings, affected by strong winds.
Workers who use a heater to connect a lightning conductor must work promptly while being aware of the danger of turbulence of flames due to strong winds and the prevention of falling of molten solder. Because it is an outdoor construction, it depends greatly on the weather, rain, strong wind,
In the case of snow and lightning, the simplicity of the connection work has a great effect on the construction speed, as well as the large effects. Conventional work using connection terminals for connecting lightning conductors requires a heater and several tools and requires skill, and the structure of the connection terminals themselves is another step toward work simplicity and speed. There were challenges.

[0004]

SUMMARY OF THE INVENTION The present invention provides a connection terminal having a structure which can be quickly connected without brazing, has sufficient mechanical strength, and can be electrically connected.
In this connection terminal, a melting heater is not required at the time of brazing, and the working efficiency is significantly improved.

[0005] The connection terminal according to the present invention is based on the idea of connecting by a single screw tightening and simultaneously deforming the inserted lightning arrester inside to strengthen the connection. According to this means, if the end portion of the lightning conductor is processed in advance, the connection can be made firmly only by screwing at the site. A connection terminal for connecting a lightning conductor such as a conducting wire (wire, rod, pipe, or the like) and a plurality of conducting wires, such as conducting wires, is provided on one or both (including a plurality) of the drawing side or the drawing side for use. Is done.
Here, the present invention is a wedge (13) in the center of the hollow hole (11) bottom (12)
And a nut (1) with a hollow (14) formed around the wedge (13) and a screw (15) cut into the inner surface of the hollow hole (11). Mounting hole (21) through which a lightning conductor for lightning is inserted, and is screwed to a predetermined depth with a screw (15) on the inner surface of the hollow hole (11). A connection terminal for a lightning conductor is provided.

[0006]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of a connection terminal of a lightning conductor according to the present invention. FIG.
It is sectional drawing of the connection terminal in the state which connected the round bar (30) of diameter 10mm in the linear direction. The nut (1) is of an embodiment in which two round bars (30) are connected in a straight line direction by opening both sides.
If the direction of the opening of the nut (1) is set variously, a plurality of nuts can be connected in an arbitrary direction. Figure 2 shows a round bar (30)
It is a side view of the front-end | tip part of. FIG. 3 is an end view of the bolt (2). FIG. 4 is an end view of the nut (1) viewed from the opening side. FIG. 5 is a sectional view of the connection terminal in a state where the stranded wire (301) is connected. FIG. 6 is a front end view of the caulking (4). FIG. 7 is a side view in which the caulking (4) is brazed to the stranded wire (301).

The connection terminal of the lightning conductor according to the present invention comprises a nut (1) and a cylindrical bolt (2), and connects the lightning conductor having a connection tip deformable in a predetermined manner. The lightning conductor is a round bar (30) or a stranded wire (301). The lightning conductor is preliminarily processed so that the tip can be expanded and expanded. However, the processing can also be performed on site. In one embodiment, the tip of the round bar (30) is
A slit (31) is inserted in the cross direction in the axial direction, and a male screw (32) is cut on the outer surface.
A shaft detail (34) was provided behind the cut (32). The round bar (30) is screwed into a female screw (24) cut on the inner surface of a bolt (2) described later and made to protrude therethrough, and then brazed and welded to a shaft detail (34). Since it is threaded through the male screw (32) and the female screw (24), it does not come off once screwed in, and after deforming to open the tip slit (31),
It does not come off because the screw does not rotate. Moreover, the thread of the male screw (32) cut on the outer surface before that is crushed and pressed against the inner surface of the nut (1) described later, so that it is fixed and does not move. The twisted wire (301) has a slit or a guide hole (33) for insertion at the end, and has a configuration in which the twist is widened and pressed against the inner surface of a nut (1) described later. Then, caulking (4) is brazed (4) to the twisted wire (301) to prevent the twist from spreading.
1) Yes.

The nut (1) has a hexagonal outer periphery, a sharp wedge (13) at the center of the bottom surface of the hollow hole (11) and a tapered pin, and an empty space (14) around the wedge (13). )
And a screw (15) is cut on the inner surface of the hollow hole (11). At least the inner surface of the hollow hole (11) of the nut (1) near the opening is cut with a screw (15), and from the hollow hole (11) space near the opening to the back, the wedge continuous with the space is provided. There is an empty space (14) formed around (13). Wedge
The vacant space (14) formed around (13) has a conical shape wider than the inlet opening. That is, the inner peripheral surface of the empty room (14) is a tapered surface. The inner peripheral surface of the vacant space (14) is not limited to the tapered surface, but if it is formed in a tapered shape, the distal end is firmly expanded and the connection is strengthened. The tensile strength is dramatically improved. In the nut (1), an arbitrary number of cylindrical portions provided with hollow holes (11) having projecting wedges (13) can be formed in any connecting direction.

The cylindrical bolt (2) is connected to the nut (1).
The hollow hole (11) has a cylindrical portion (20) cut with a male screw (23) screwed to a predetermined depth with a screw (15) on the inner surface, and a hexagonal head (22). Mounting holes (2
1) is provided. When attaching the round bar (30), use the mounting holes (2
It is preferable that a female screw (24) is cut in 1), and a male screw (32) is also cut on the surface of one round bar (30) so that the screw passes through the screw portion and protrudes. Of course, it is also possible to braze and weld by simply penetrating without cutting the screw.

[0010] The lightning conductor described above penetrates into the mounting hole (21) of the cylindrical bolt (2). This attachment may or may not be brazed. Round bar (30) divided into slits (31) at the tip
And a guide hole (3) that guides the wedge (13)
A conductor, such as a stranded wire (301) provided with 3), which has been processed in advance so that the tip can be pushed open, is penetratingly mounted on the bolt (2) with the tip protruding a predetermined length.

At this time, a caulking ring (4) is fitted to the stranded wire (301) divided by the slit (31) or formed with an axial guide hole (33) at the end, particularly leaving the end thereof. And brazing (41). The caulking ring (4) is a ring having a slit (42), which is for tightening and squeezing the slit (42) to prevent the twist from loosening.

When a bolt (2) provided with a lightning conductor is screwed into the nut (1) having such a configuration, the lightning conductor becomes a wedge (13) as the bolt (2) advances.
When it is further pushed in, it is expanded and deformed by the wedge (13), and the tip of the round bar (30) or the stranded wire (301) is inserted into the inner wall of the vacant space (14) around the wedge (13). Is pressed. The bolt (2) equipped with the lightning conductor is screwed tightly to the nut (1), and the tip is expanded with a wedge (13) and pressed against the vacant space (14). The nut (1), bolt (2), and lightning conductor are securely connected without loosening.

The whole outer shape of the nut (1) and the outer periphery of the head (22) of the cylindrical bolt (2) are hexagonal,
The screwing operation with a wrench can be easily performed, and the screwing can be performed strongly.

The connection terminal of this configuration is a connection terminal for mechanically and electrically connecting the lightning conductor provided between the lightning receiving part of the lightning protection equipment and the ground electrode, and is made of a conductive material. It is useful for connecting lightning conductors, connecting the lightning conductor to the terminal box, and connecting the lightning conductor to the ground electrode. In some cases, chrome plating may be applied to the contact component to further improve the electrical conductivity. Further, the contact area of each component is formed so that a lightning current can flow therethrough. In some cases, when a lightning test is performed on a conventional connection terminal, if the degree of adhesion is low, sparks may occur, and the contact depth of the nut (1) or the bolt (2) is determined by a specific calculated value.

[0015]

[Example] Two aluminum rods (30) each having a slit (31) at the end thereof, which are made to protrude through a mounting hole (21) of a bolt (2), are prepared, and a lightning rod is installed. At the construction site, screw the bolt (2) into each opening of the nut (1) that has openings on the left and right, and make two round bars (30) in a straight line direction.
Connected. The round bar (30) is screwed in with the bolt (2).
Was pushed and spread with a wedge (13) and pressed against and fixed to an empty space (14) inside a nut (1). The round bar (30) and the round bar (30) could be connected linearly. In this connection work, a bolt (2) in which a lightning conductor is fixed to a predetermined nut (1) on site
It is very easy to work with a wrench or wrench because you only need to screw in the.

[0016]

The connection terminal of the lightning conductor according to the present invention has the above-described structure, and has the following specific effects. At the work site, the connection can be made only by screwing, so workability has been significantly improved. Mass production of nuts, processing of the tip of the lightning conductor, and fixing of the lightning conductor to the bolts can be assembled at the factory, so that only installation work is required at the site, work efficiency is improved, and construction time is shortened. The connection form has a peculiar structure in which the connection part is not exposed to the outside because the lightning conductor is expanded and closed with bolts inside the hollow of the nut. Therefore, even after connection, there is little climatic influence and excellent durability. In the connection form, the conductor for lightning arresters expands inside the hollow of the nut, and the electrical contact area becomes large, and the degree of adhesion is high.
Electric resistance can be reduced. Since the conductor for lightning arrester expands and presses in the hollow of the nut, the tensile strength is greatly improved. Since there is no brazing work on site, there is no use of a heater for brazing, no melting work, and the like. As described above, the connection terminal of the lightning conductor according to the present invention can be used to quickly and firmly connect the lightning conductor with a simple tool without special skill in lightning installation work such as work at height. Can be. It greatly improves the connection work, and has high safety without any risk of parts being detached after connection.

[Brief description of the drawings]

FIG. 1 is a connection terminal of a lightning conductor according to the present invention,
Sectional drawing of the connection terminal of the state which connected the round bar in the linear direction.

FIG. 2 is a side view of a tip portion of a round bar.

FIG. 3 is an end view of the bolt.

FIG. 4 is an end view of the nut as viewed from an opening side.

FIG. 5 is a sectional view of a connection terminal in a state where a stranded wire is connected.

FIG. 6 is an end view of the front side of the caulking.

FIG. 7 is a side view showing a state where caulking is brazed to the stranded wire.

[Explanation of symbols]

 (1) Nut (11) Hollow hole (13) Wedge (14) Surrounding space (15) Screw (2) Bolt (21) Mounting hole (22) Head (23) Male screw (24) Female screw (30) Round Rod (31) Slit (32) Male screw (33) Guide hole (301) Stranded wire (4) Caulking (41) Brazing

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-6-89746 (JP, A) JP-A-8-149679 (JP, A) JP-A-3-241676 (JP, A) Jpn. 36772 (JP, U) Fully open 57-31830 (JP, U) Fully open 58-177921 (JP, U) Fully open 62-70400 (JP, U) Fully open 60-99779 (JP, U) JUKI 7-12746 (JP, Y1) (58) Fields investigated (Int. Cl. ⁷ , DB name) H01R 4/28-4/52 H01R 4/64-4/66 H01B 7/00

Claims (6)

(57) [Claims] 1. A wedge (13) protruding from the center of a bottom surface (12) of a hollow hole (11), an empty space (14) is formed around the wedge (13), and an inner surface of the hollow hole (11). A nut (1) having a thread (15) cut therein is screwed to the screw (15) on the inner surface of the hollow hole (11) to a predetermined depth, and has a mounting hole through which the lightning conductor is mounted. 2
A connection terminal for a lightning conductor with a bolt (2) provided with 1). 2. The lightning arrester has a slit (3
1) a round bar (30) divided by (1), which is inserted through the bolt (2) and is inserted into the hollow hole (1) of the nut (1);
The lightning arrester according to claim 1, wherein the round bar (30) is screwed forward and the insertion end of the round bar (30) is pushed out with a wedge (13) and pressed against the inner wall around the wedge (13) to connect the round bar (30). Connection terminal for conductor. 3. The lightning arrester has a slit (3
A stranded wire (301) divided in 1) or having an axial guide hole (32) drilled at the end thereof, which is inserted through the bolt (2) and inserted into the hollow hole (11) of the nut (1). As the screw is advanced, the insertion end of the stranded wire (301) is pushed and spread by the wedge (13) and pressed against the inner wall around the wedge (13) to make the stranded wire (30).
The connection terminal of the conductor for lightning arrester according to claim 1, wherein the connection terminal of (1) is connected. 4. The connection terminal for a lightning conductor according to claim 1, wherein the outer circumferences of the nut (1) and the bolt (2) are hexagonal. 5. The connection terminal for a lightning arrester according to claim 1, wherein the vacant space (14) formed around the wedge (13) has a conical shape with a wide bottom. 6. A stranded wire (3) in which the tip is divided by a slit (31) or an axial guide hole (33) is formed in the tip.
01), a caulking ring (4) is fitted in front of the bolt (2), the bolt (2) is screwed into the nut (1), and a stranded wire (301) is connected. A connection terminal for the lightning conductor according to claim 3.